WASHINGTON, July 7 (Reuters) - The U.S. National Transportation Safety Board said on Friday it is investigating an engine fire last week on a Boeing (BA.N) 737-900 MAX plane operated by United Airlines (UAL.O) at Newark Liberty International Airport in New Jersey. The NTSB said a fire warning light indicator came on after United Airlines Flight 2376 from Fort Lauderdale, Florida landed at Newark on June 28, prompting the crew shut down one of the engines. Passengers exited from the plane in a normal fashion in Newark, according to the Federal Aviation Administration. The FAA said the plane landed after the flight crew activated the engine fire extinguishers as a precaution. Boeing referred questions to the NTSB and United.

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Persons: France's Safran, Kanishka Singh, David Shepardson, Will Dunham, Leslie Adler anda Kim Coghill Organizations: U.S . National Transportation Safety, Boeing, United Airlines, Newark Liberty International, NTSB, Passengers, Federal Aviation Administration, FAA, United, CFM International, General Electric, CFM, Thomson Locations: New Jersey, Fort Lauderdale , Florida, Newark, Washington